On the morning of April 26, 1986, a Soviet nuclear plant at Chernobyl (near Kiev) exploded, pouring radioactivity into the environment and setting off the worst disaster in the history of nuclear energy. Now a former Soviet scientist gives a comprehensive account of the catastrophe. Photographs.

On the morning of April 26, 1986, a Soviet nuclear plant at Chernobyl (near Kiev) exploded, pouring radioactivity into the environment and setting off the worst disaster in the history of nuclear energy. Now a former Soviet scientist gives a comprehensive account of the catastrophe. Photographs.